API: register, bag rules, coupon, order and cancel
App: TrendKart, a practice fashion marketplace (Myntra-style). Login: Guest checkout works; members: arya@trendkart.test / Trendy@123 or register. REST API: tests call it as /api/... through the request fixture or page.request; GET /api lists every endpoint ↗.
Interview scenario
"Write the API journey a new customer takes: register, try to add a product without a size and an out-of-stock size, add three tees, apply TRENDY10, save an address, place a UPI order, see it in the order history and cancel it. Assert the money at every step."
Acceptance criteria
- POST /api/auth/register with a unique email: status 201 and a token.
- POST /api/bag/items for productId 104 without size is 400 (Please select a size); productId 101 size XL is 409 (out of stock).
- productId 104 size M qty 3 gives totals.total 1197; coupon TRENDY10 gives totals.coupon 120 and total 1077.
- POST /api/addresses, then POST /api/orders { addressId, payment: 'upi' }: status 201, order.status confirmed, totals.total 1077. GET /api/orders has 1 item; POST /api/orders/:id/cancel sets status cancelled.
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